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Circuit-, IC descriptions and list of abbreviations
9.
DAIO Connector (item 1901)
The Digital Audio In/Out (DAIO) connector is used to
interchange digital audio (SPDIF) signals between the IOE-
Board and the Digital Board.
VIO Connector (item 1904)
The Video In/Out (VIO) connector is used to interchange
analogue video signals between Analog- and Digital-Board.
9.7.11 Progressive Scan
Introduction
There are two versions foreseen, to generate a progressive
scan analogue video output:
•
In the standard Chrysalis board, the 'low end' progressive
video output is generated by the PNX7100.
•
In the Chrysalis 'F', the 'high end' progressive output is
generated by the Faroudja FLI2301. This IC offers
additionaly DCDi, upscaling to HDTV, and picture
enhancement.
Description
The progressive scan part is integrated in the Digital Board and
built around the FLI2301 de-interlace/line doubler (7701). This
I2C controlled de-interlace uses a 64Mbit SDRAM (32bit x 2M)
to perform high quality de-interlacing (meshing). The de-
interlace gets its digital YUV input data from the PNX7100
(7400). The format of the digital YUV input to the Fli2301 is
CCIR656 with separated Hsync, Vsync, and odd/even signal
running on 27MHz.
9.8
Service UART Interface
Logic IC 74HCT14D (item 7111) is used to make a level
conversion from microprocessor (LVTTL) to +/-5V (compatible
with most RS232 interfaces) and vice versa. The control line
MPIO19_CTL_SERVICE is used to activate service and
diagnostic SW at start up procedure. The connectivity is
provided via an external service tool.
9.9
EPG Nafta Board
9.9.1
General
Two ASICs from Gemstar, GS501 (item 7100) and GS502
(item 7201), generate the EPG OSD. The host P controls both
ICs via the I2C bus (pins 45 and 48). A RAM memory (item
7102) and a Flash memory with the firmware (item 7101)
belong also to the periphery of these ASICs.
A PIC processor (item 7303) generates the POR_N reset for
this system. The POR_DC reset comes from the set, and is
active after AC power 'on'. A port expander from the host,
controls the EXT_RESET signal. This port expander (item
7200) is also used for switching the video paths on the EPG
board.
Either the board works in 'Loop Trough' mode, or (for EPG) the
output path is switched to the 'EPG RGB' video.
Figure 9-12
Summary of Contents for DVDR70/001
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